Answer:
is the total distance of the trip travelled.
is the average speed of the journey
Explanation:
Given:
- duration of first interval,
- speed during the first interval,
- duration of stoppage,
- duration of second interval,
- speed during second interval,
<u>Now the total distance travelled:</u>
<u>The average speed:</u>
The acceleration that the net force will cause is 7.5 m/s²
To solve this problem, first, we need to find the net force.
⇒ Equation:
F = ma................ Equation 1
⇒ Where:
- m = mass of the box
- a = acceleration of the box
From the question,
⇒ Given;
⇒ Substitute these values into equation 1
We also use the same equation 1 to find the acceleration that the net force will cause to a box of mass 2.8 kg.
⇒ make a the subject in equation 1
- a = F/m................. Equation 2
⇒ Substitute the appropriate values into equation 2
Hence, The acceleration that the net force will cause is 7.5 m/s²
Learn more about acceleration here: brainly.com/question/605631
Answer:
True
Explanation:
When non-conservative forces are present, the amount of work done increases with the length of the path, this is true because, when a force is applied, the force does when and the non-conservative forces also do work. Since the non-conservative force work against the force applied, this tend to increase the net work done by the applied force to compensate for the loss in energy due to the work done by the non-conservative forces.
The bomb strike the ground relative to the point at 1km . B
<h3>How to determine the distance</h3>
Using the equation
h = 1/2 gt^2
500 = 1/2 * 10* t^2
500 = 5t^2
t = √500/5
t = √100
t = 10seconds
To find the distance,
Distance = velocity * time
Distance = 100 ÷ 10
Distance = 1000m = 1km
Therefore, the bomb strike the ground relative to the point at 1km . B
Learn more about projectile distance here:
brainly.com/question/15502195
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1) In the initial situation, the total mechanical energy of the system is given only by the kinetic energy of the ball that is moving with speed v:
where
is the mass of the ball.
In the final situation, where the system (ball+pendulum) rises a vertical distance of h=0.145 m, the system is stationary (v=0) so the total mechanical energy of the system is the gravitational potential energy:
where
is the mass of the pendulum.
For the law of conservation of energy,
, so we can find the initial speed v of the ball:
2) The kinetic energy lost in the collision is the initial kinetic energy of the ball:
